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#pragma once
#include <Poco/Timespan.h>
#include <base/types.h>
#include <QueryPipeline/SizeLimits.h>
class Stopwatch;
namespace DB
{
/// Limits for query execution speed.
class ExecutionSpeedLimits
{
public:
/// For rows per second.
size_t min_execution_rps = 0;
size_t max_execution_rps = 0;
/// For bytes per second.
size_t min_execution_bps = 0;
size_t max_execution_bps = 0;
Poco::Timespan max_execution_time = 0;
/// Verify that the speed is not too low after the specified time has elapsed.
Poco::Timespan timeout_before_checking_execution_speed = 0;
/// Pause execution in case if speed limits were exceeded.
void throttle(size_t read_rows, size_t read_bytes, size_t total_rows_to_read, UInt64 total_elapsed_microseconds) const;
bool checkTimeLimit(const Stopwatch & stopwatch, OverflowMode overflow_mode) const;
};
}
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